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Guy Steele argues that when you don’t know whether to expect a 4:3 or a 16:9 projector, you should use 20:13 as the aspect ratio.

But beamer supports only a fixed set of aspect ratios via the aspectratio= options, and 20:13 is not one of them.

How can I still produce beamer slides with a 20:13 aspect ratio?

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1 Answer 1

Reset to default
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Adding

\makeatletter
    \setlength\beamer@paperwidth{20.00cm}%
    \setlength\beamer@paperheight{13.00cm}%
    \geometry{papersize={\beamer@paperwidth,\beamer@paperheight}}
\makeatother

should do the job, though it might be necessary to tweak the overall scale here.

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  • Thanks! Went with 15.38cm/10cm for now.
    – Joachim Breitner
    Sep 15, 2018 at 22:13

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